ISO 4580:2021 specifies basic dimensions, characteristics and engineering requirements for TORX PARALOBE driver bits used with aerospace fasteners.
![ISO 4580:2021](https://www.365standards.com/wp-content/uploads/2023/03/ISO-4580-2021.png)
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ISO 4580:2021 specifies basic dimensions, characteristics and engineering requirements for TORX PARALOBE driver bits used with aerospace fasteners.